Donald Trump said Monday that he would forgo a salary if elected president.

Mr. Trump made the promise while fielding an array of questions via Twitter. He weighed in on everything from whether Baltimore Ravens quarterback Joe Flacco is an elite player to what he would to do reduce student debt and help the homeless.

“As far as the salary is concerned, I won’t take even one dollar,” Mr. Trump said. “I am totally giving up my salary if I become president.”

As for Mr. Flacco, Mr. Trump said “absolutely he is an elite quarterback.”